Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47e5e1f1aa26206629ed6d240a89a7d02cb77de0b4fedeb78b7edf2cbac40fa5' 
  AND token = 'xtQqbBrfFbL4WQlNuaqD+TO2Ev4OZzzOSkikGx1ulIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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