Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fccf6f0c612f0af149552b7343a3bf1211ec6251aa9e75ba8984f0630f587c4b' 
  AND token = '4EiyQDiCf2bjRVD+xptAAhOOMv1YDa4lw9Wujn/db/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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