Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12672a73df597ac29b1762a276c8c4489151d1ce2811e194d77cae336e2d89d4' 
  AND token = 'h+SUy2wBwY/KNokGm256xGDWHmU7up04DSLtLnVZ9XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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