Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bc14941570b6c0071c8f60add3e81ca1a552514a69ac84b7f56206f4e084ddc1' 
  AND token = 'hCs8XVZdFQKZV3sL4AI7UrakMgirk4h6cSQjFfZmles=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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