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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed69bd5f573846944dc198889e5941a10e32b1709852bd4379c534569156eb5e' 
  AND token = 'Y8YB3pCeg6tIe4bNOdBv1wcQoLQOeltew894izJ9o+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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