Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2f15c886ecc7ea0c1965cd9fe3490a294171612a25457f2832c730e2f35588c' 
  AND token = 'Y/ocIc4JhmT/q6raXqSroHsjT1O6ugTxMn44aC7B0nA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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