Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e309ed18d6523acd7baa5b54d3163925d9b3167d53aacdde9ecbe2e0547d1db1' 
  AND token = 'xDx2H2YPPMeDlR4ydFEjvtgaHaZ+KXEe75sCnR9U2mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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