Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7cf4c5a880ac70394692b62394547d9e370d5d54c43bdd361d666c955b2a580' 
  AND token = 'nDKEreYRyaQxl6ifXtB5YQVuE8SyeB1FP4qaO+A3vhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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