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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c982d8a1716c587689ccfa3998275c6e88e5323d56f0dc2647b2eb994d4ea3eb' 
  AND token = 'laNI13BQ/is98j0BbMLK5ESnHI+O5adpIqAdd+1UHBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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