Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffb676cff9e9f767fa94e83e766656e271e4aa6ea405323cea7e988f4d21f7c4' 
  AND token = 'd5Boa/WxVbOcrQAAqg/X0mmTdIsuyyowSbyeKrbDHYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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