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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa10f0ad55d359c9438c828401f009a6b0c7f6d3babcc2c457179be2bce17a67' 
  AND token = 'pQJkkgtHMXiTUCFFOd7HembT9HQn9q8SgOTChYiiD5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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