Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a88baaf701f712eafb2a47ee0f9062c3f6694d3e28114c3b22c58677b9bb2ce9' 
  AND token = '9LAFOSdHxagFYg2zdxaQnzzWmgCQ9VH6PABSfs/UAjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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