SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '554f33c5e3f710582edccd69b9eed7e3ed92670cf0d8474b7a02d67bb3a8c155' 
  AND token = 'M+KLdq9XKSq/hwJKDzZoh6+frFBFrxrzitKxYhxKWpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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