Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3ee0b77c8ddc727fd3b7e5a8df67cac9e4531e2462b58cda2de70c54113123b' 
  AND token = 'FP3ep7BCKf9wwusMAat3aMpaoIXa6FlIBdeRaBJFmRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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