Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '194133dbc01ffdb22f5e2e25ca526a827b66b2ece94d95f00792558eaa969dd7' 
  AND token = 'oXVLJAlCDicd/ikhgUkivFmm5vmmaTPtVJk4nRaReoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}