Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e03508de947860388bc592039f64f4b9390aee591265ee5546da42a610614ef7' 
  AND token = 'MkedKkKQLNQX2yAOn3SicKM6fP4NnMslYnhTdxFLOOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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