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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f90c72e8db3425b981d79412b5028a4470a99dff12a02fff74f49d1a3e3368b0' 
  AND token = 'vnM0wTxZ6v+ox2vZF2BSVJnc30hMnWLFuPZ9TRZ0f1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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