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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32fbe8030232504dfe78943b9290693febc5a1f02fc6e4b4e966f9fe99553fd1' 
  AND token = 'Ji0jTT1yzfRFOCF38C2+oI+QSgqGZh5t6rdEnw5wMpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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