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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e563b1ac78c953206f794f6e0971f9edc4664d1b217fec7e3884bb060b77d929' 
  AND token = 'wNtsAyiFlkJbidTLPz67losZ6zq6P7MBg5k2yU96bW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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