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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67fceda3d478f89847d2baa41a1c74f327e146c836244b34bb136eaa32fe3487' 
  AND token = '2jQcAPpEA9UU3vjfGyV8hRtvYqc+6x52mCQavoJpFbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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