Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce9a2260100459f81ad4acc08b741484b59587c487758082cb3131d477014f23' 
  AND token = 'LcGfLzuslqkA2v+zyooOGQUFQ8F+8gsC+pm2qWh787M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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