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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2888d2b96c36b5b647b7f95c9750ef16afc0784a61ddceb84b48f665357e36d6' 
  AND token = 'P25+hXx9VOU0GES9XysM5y1wvX6h6CudJyIrPdYqH6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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