Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ee73fa518490168069ce1e0444834ae4fb1cfe57b531817c06d957a4d82e525' 
  AND token = 'UvwRdHkQ/1FT6TsW7rdKkVE+t+Fuc2LmY3XrcvrhDXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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