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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22dd68ae4b5b59bc4c5e36cc4828c6d3a157b3cae1d55715edf55f2dcb87cc8b' 
  AND token = '9lzQlcW6hHIO45wD/Kv1eSAuWfVuyJqh+I8IyI9iWXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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