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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e48d9c7abbe8d4d2536685cdb209ac303ef8c161a3c22ae31cc308c3ec934571' 
  AND token = 'Uybo6dBicu4NFIcqXfvx9qM4hfRg8KKn4TOToPSUick=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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