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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d098b2bab6cb54032d6c6539485d3b294997b0a088dc13d45753e77eb65fd09' 
  AND token = 'nuH8uX6Si0pQFwBN5R8g2rz+SP8BJuVpkUv5PFanfDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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