Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad41df2de179d4d7c00b78f15a6ccc6510c80c1af0132af04298a4dd7b90a2e6' 
  AND token = 'n1CmrcfbEqHO9xB76RdWhBhiWjDEk7jhgH36jBnas3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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