Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0c9c60e9922984ae0233b4c99762acfdd9b28398e1fe0abf752f92aa43b94b3' 
  AND token = 'Yrj2egfHaX5wn19b/4tqruOKbu+AS9Rqed7tLDvdAHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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