Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7da4558c8d90ab706a10eafd074a17a59cfcb0d3717eb7a63a536bdc7fa06bc1' 
  AND token = 'RSs41oxfdIV4dUDcNtWigVVd+5HKk9bVH8bAhLop40Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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