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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0faee3ef8282bec862026b3eaf70f9e00f81c39f4360563ca74167506f52921b' 
  AND token = 'Bguj5lUmtYyYXnnx5nVpVTMyKqbcfeLLCo1dT2lRdfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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