Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '558dd899471c83aa5d434a3b1e1078aafe0378b0be5f4cc289b21b62e1607038' 
  AND token = 'c+kV0q5ddgQMzvjxG7ItjPsxWBtz/3ry0AK0Cn32Dys=' 
  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"
    }
  }
}