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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47d840829ffdfc10d1873d10ca0543aa6415032be5c19ea2bb6eb33a53671f6c' 
  AND token = 'T0px1+MkawPL6d2CrFQOGak7EqQQA0/SUylzpX2/OOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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