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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19b3ea0b18702691789a81f5e011c69e4b95668d42bab1f13cdac02c51630382' 
  AND token = 'Wo0WL37PyfBR8wbyp7nr7+7+ROShgA+2MaZjc4C4hlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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