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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59c73c5cf0d09b6001f2dde18d5cc9bae533c63fce2c340c04a15412684b405f' 
  AND token = 'WgORH221kEDlSqWd//kjV2LZasJggVs5YxhSzx01s/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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