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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95053136f9efd25db604c1d8fc71eb54a45f74afd4faa11a3e1233ab5559bbe2' 
  AND token = 'zhGmPrWLT4S3cOBZm6P9zd4B5a+/xvLUXm702OTEDlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}