Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2a6b5074e0c8193f58e4a1a58e52e321987cbaee31b77046e2e0b2ca59f4949' 
  AND token = 'ttMiTvaEEIGVjA2jAJLJO9HrsAMm1VR9cMOtDuqJJKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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