Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dc297a0ae03b0b5e7b832ef2012581abd525a0ff7e51da019011b0e06d9a04f' 
  AND token = 'ePiYRK1s0fa4tC6S07mQ1WtiNLAQDCK5IYYB4tGKBBQ=' 
  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"
    }
  }
}