Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0ce7df7d9bc9fd44a7f6936eaa67c2a072fa1c30e82d85c414a1b5ad3fd2a2' 
  AND token = 'Gc8c37r1uoKaLzJCoPQ3rEfSMgjXvJJ7LIr0Hdw29Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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