Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9054985f083e7d57fb64adf1876a3f35cb00fcca42ec1bb44d25589bdf2bf3b' 
  AND token = 'V7btW2KftNF2a4AC0W+YWHFgDBVrH2tRUemFxZD3MMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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