Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d63c1b851068f91572388a026bca27259dc75eaddab4370da917aaa97d89550' 
  AND token = 'T6xdV4FjUN4BFGxXqmJW7Ij+TYRxk5AYnLIvFyfzacE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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