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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f63eaf2393a0d7b00357c4d7958aec5ff6407561d28cb02098e390b9b6b83f07' 
  AND token = 'auRKI/uzXahRjUN6TPkFwbaNGw/srBkG5PDpbO74eo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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