SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5164e986765d0b17305240628803ef7dd599cacc3f104c5f821ab18628522ac' 
  AND token = 'UT3R4MKgYnCUS1F9ra8BjZWKPJ8fmUo4oPw38u+pxYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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