Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57402544860c64b8d200e90b46c8058a595d5e2055934ebe5f94da16f242a1b0' 
  AND token = 'b3tGzcdJVTnn7b98iYu7c11WUxYg6ef/1b/QW8XnwNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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