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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6185c2c16a636c431f08ced83efa4ed1dfd74c5706d9add549a63117782dd20' 
  AND token = 'xt2Bxd96dlS9M6pYAoKhnaBr22Qqqc1CRenltyCmt1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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