Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14d7240023e5eaffe9e4df7990f289997537f9a0f39698cc922c57b9eabf7af0' 
  AND token = 'pgU1XNyPGCtMmHfr75qArgxCTQh6Ho1e1dz/KMy/ufY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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