Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3625fa543c8d45bd23b1f3af84042e3b82040d6bac7b0b6ac509f0086738c03f' 
  AND token = 'cOUxy6F+eZwUdAh86h6WVD5x98OOdfHrLNtf8clJ2Pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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