Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5094323808116553461681ba07689555aa506aedcc372ee8fe8b5b0e7bf3a18' 
  AND token = 'Y6ku5sDwf8gRprq90dTDPrcfACBOsHq5Rig86yRGkZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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