Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b158e19b78460054fb5fc019d047fe4930244a1a676308d150bd9c5b440ce04f' 
  AND token = 'w7qXltAPcG+FiUTZX2mYYL1OCtzXoglnDctKLldyFaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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