Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e38c315eb1de63a88c7d9079461809016156c17df6ba2fac6304678bb14d4e79' 
  AND token = 'dWvxwOU4/GiuVQywIB+NIGzaryCNNOesCCHfjACUIR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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