Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0ae147daecd64d21f600ef80505007f23d2ca880c78c1e80b624718baf2429d' 
  AND token = 'o+Gy5SXsQSzHrK3FssNTm6eR1R6gA6MW4OkWunw/Avc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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