Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '006e531c3f9418647dd077b83b42b7dbe8ad5aafcd49ebd35262c68605774f2e' 
  AND token = 'PjZ6aXhp1SGy6PEinuo5oIDz+Kokph7xATUSxX/Ooag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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