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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe68f9c6e8c06e4a6b8273c8ff74ca8553ec8ee6c341e194ca42fadec124c4e4' 
  AND token = 'xWJZGZL3YcYBqydC/XJUlsdUpUMmQvS44Jj9WANi5dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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