Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed9198ebf75b9624a03d42acaa9637cd0f0fdbf7a72c53e4bf849f3fe0e70a07' 
  AND token = 'DLawSBDA4jFhF9APOXXFLniDqvkMpcguyO5mYClzhjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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