Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe33b4973f8e574ed9745b6c6f6ac8ab362aec0e847f7f80d45c3f20a4e52de8' 
  AND token = 'oTqCvSmQnSBs1DyLqOwSGT+BRRwSMcYqBMcZtIf0n6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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