Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd27d2a401b4a60b41565b9b65ed4e08e9137c07b1e253b4073d8cf49ed2ee58' 
  AND token = 'OaFoRvjUdzpA9upO5d6F3RCczziMYhQ8In6D6EGYLlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}