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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c09ab91bc57a894bd15231dc7aedcd23b2fbabe803ca811011f6efb5de2687c' 
  AND token = 'xs5hcH7l+jjtns3RUm7vKz+9FhcTcGWCNniQ7O5fGPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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