Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2119c633fa2f8feab3788fa34f697ca01404948d6a65338e35b2237efdd707b' 
  AND token = 'Krzd+EQ7c8AClVeBUvtMPcquh06tinB9SZ6rwZ6oPyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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