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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dab969dd2a423251021fb65e537559456a4f782fd4248b6a59c0d926a6f0d06b' 
  AND token = 'W7cRKQ7fgdamPim9s2C30ytfr7FYvF+e4P8M3YCcVjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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