Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b37fb5cc6411083208cd1c8f2a91c3a6ab3d8f0244348d4d18d1cd096d87062' 
  AND token = 'YB2fLBLP0EGXDvTd2ntSag7QtKlB8Sevu2Yab9nisfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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