Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd63a365299eb2c4a495bf93282a3209ca44eb285c5a8799782c4e7c11a5d46d' 
  AND token = 'S4qzhD5DNAC1UQhErsZmR1iltaaLSiWgNgoFHO/eKAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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