Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9e0bc7e68b4fd925c0d4a16e3c94b90d54c68b8d15d3b11c2cda778036c4fa2' 
  AND token = 'ooyEW+KL+CwJJ9iPBukfNy/GNTi/L0LYLiO4JuE0uTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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