Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8ae7fc4a6874fc5e05a2a4cc407660dbaa096004b868cf5555abb014969deac' 
  AND token = 'Mmf3yazdjrqpnYYoTBWKCafRQqVthKydeosPJChSoo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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