Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc5b46abeee715b6410c48227601bbe9d9bc8e9ed2c0185466250a2c0aadb16b' 
  AND token = 'THlUViR3pVepSJ23pmUmc/kOfMdlfmLgphN/cL9rbRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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